Liquid purification or separation – Flow – fluid pressure or material level – responsive – Diverse sensing means
Patent
1997-11-10
1998-09-29
Woo, Jay H.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Diverse sensing means
210128, 210232, 2102423, 210122, 137264, 137389, 137423, 137409, 137571, B01D 2124
Patent
active
058142134
ABSTRACT:
An improved skimming apparatus for skimming a two component liquid includes a housing mounted to a tank below the normal liquid level for the tank, an outlet for pumping fluid from the submerged housing and an intake structure extending upwardly from the submerged housing and defining an inlet for permitting inflow of liquid to the interior of the submerged housing. The intake structure includes an intake tube rotatably mounted to the housing at upper and lower ends. The intake tube rotates in response to variations of the liquid level in the housing, to vary the inlet size and hence the rate of inflow to the housing. An adjuster provides control over the variation of the inlet size, to accommodate different skimming rates for liquids of different temperatures. An intermediate tube surrounds the intake tube, and an outer tube surrounds the intermediate tube. Aligned slots in the intake tube, the intermediate tube, and the outer tube define the inlet, and the inlet moves vertically with vertical movement of an external float and the outer tube secured thereto. The intermediate tube slot is shaped helically and rotatably cams with vertical movement of the float and outer tube, to maintain the same cross-sectional shape for the inlet despite variations in the liquid level in the tank, and for a wide range of liquid levels in the tank. A breather tube extends from the housing to atmosphere, to permit escape of entrapped air from the housing. These features enhance the durability and versatility of this improved skimming apparatus.
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Prince Fred
Woo Jay H.
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